A lemon herring is a girl you believe to be a lesbian due to weight or shortness of hair. They turn out to be either straight or with no sexual interest at all.

Other excellent indicators are sporting endeavours and lack of interest in consensual sex with yourself. They lack conversation with the opposite sex and often like KD Lang, Texas and vegetarian dishes

Jesus! That girl is hot. Even with short hair! But when I asked if she'd ride my pork sword she declined said offer! Must be a lemon herring.